Powdered-fuel-feeding device.



PATENTED 001?. 18; 1904. o. BROSSMANN, JR. POWDERED FUEL FEEDING DEVICE.

APPLICATION I'ILBD JULY 24. 1902:

no MQDBL.

15206721507 C/zals. 3706 5 mmznfz 6 3 flitorngyfi UNITED STATES I Patented October 18, 190

PATENT. ()FFICE.

POWDERE-D-FUEL-FEEDING DEVICE- SPEGIFIGATION forming part of Letters Patent No. 772,606, dated. October 18, 1904.

Application filed July 24, 1902. Serial No. 116,791. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES BRossMANN,J r. a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a certain new and useful Improvement in Powdered-Fuel-Feeding Devices, of which the following is a specification. i

My invention relates to devices for feeding coal-dust or other pulverized fuel into furnaces orother places for combustion, and has for its object to provide a new and improved apparatus for this purpose. In the accompanying drawings, Figure 1 represents a sectional view of my apparatus.

- Fig. 2 is a cross-section of the hopper and conveyer. Fig. 3 is a detailed section through the sleeve and associated parts. Fig. 4 is a sectional view through the fanvchamber.

Like parts are represented .by like letters in all figures.

In carrying out my invention I provide a hopper A, preferably of the shape shown in Fig. 2. Associated with said hopper and leading therefrom I provide a fixed pipe A, which may be extended to any desired distance and its opposite end supported, as indicated at A In the bottom of the hopper A and extending'through the pipe A, I provide a shaft B, around which is a worm conveyer B. The shaft B, being mounted in suitable bearings B and B is rotated by means of the driving-pulley B, to which power is applied from any desired source. In the bottom of the pipe A is a slot or opening A Adjustably fitted onto the pipe A is a sleeve C, in which is a slot or opening 0, similar to and associated with the opening in the pipe A, and which when turned on the pipe by means of the regulator C made to work in the slot 0 regulates the size of theopening from the pipe.

Around the pipe and supported in any desired manner I provide a fan-casing D, preferably circular in form and constructed of any suitable. material. Mounted within the fan-chamber D in such a manner as to revolve around the pipe A, I provide a centrifugal fan comprising a series of blades D The fan is so mounted in bearings D formed in the walls ofthe fan-chamber D, as to leave between these bearings and the pipe A ,around which it revolves, openings D for the passagev of air into the fan-chamber. The fan is driven by means of the pulley D, to which power is applied fromany desired source.

opening D, leading to the place for combustion.

Having thus described a device which illustrates my invention in one form, its use and operation are as follows: The coal-dust or other pulverized material contained in the hopper A by its own weight settles in the bottom of the hopper, where it comes in contact with the conveyer .B, mounted on the shaft B, which is driven by the pulley B at any desired speed, and is thus carried from the'hopper into and through the pipe A until it reaches the slot or opening A in the bottom of the pipe. The size of this opening is regulated by means of the sleeve C and the regulator 0 connected therewith, and allows the dust or other material to be discharged from the pipe, as may be desired, into the fanchamber D, where it is caught by the blades of the fan D which are driven at any desired speed by means of the pulley D mixed with the current of air admitted through the openings D and in a uniform manner forced with the air necessary for its combustion directly from the fan-chamber through the opening D into the furnace or place where it is to be consumed.

Of course the size and proportion of these several parts may be greatly altered without departing from the spirit of my invention, and I do not wish to be limited to the par ticular or'precise thing which I have shown.

I desire to have my drawings taken in a.

sense as diagrammatic, intending to illustrate my inventionand show one form of apparatus in and by which it can be realized.

.I claim- 1. Apowdered-fuel-feeding device consisting of a feeding-fan with a hollow center having a fuel feeding aperture associated therewith, a fuel-conveyer apparatus which From the fan-chamber, preferably near its top, is an delivers the fuel in such hollow center opposite the feeding-aperture, said aperture arranged for discharging it outwardly to the fan-blades.

2. A powdered-fuel-feeding device consisting of a feeding-fan with a hollow center, a fuel-conveyer apparatus which delivers the fuel in such hollow center and having associated therewith an aperture for discharging the fuel outwardly to the fan-blades, said aperture regulable to regulate the supply of fuel.

3. A powdcred-fuehfeeding device consisting of a feeding-fan with a hollow center, a fuel-eonveyer apparatus which delivers the fuel in such hollow center and having associated therewith an aperture for discharging the. fuel outwardly to the fan-blades and airducts which open into the fan about such hollow center.

4:. A powdered-fuel-feeding device consisting of a feeding-fan with a hollow center, a fuel-conveyer apparatus which delivers the fuel in such hollow center and having associated therewith an aperture for discharging the fuel outwardly to the fan-blades, said aperture regulable to regulate the supply of fuel and air-duets which open into the fan about such hollow center.

5. In a powdered-fuel-feeding device the combination of a fan-chamber with a dis charge-opening therefrom leading to the combustion-chamber, a fan in such chamber, a conveyer to convey the powdered fuel to the middle of such fan and air-duets which lead the air into such fan at the point of such discharge of the fuel into the fan.

6. In a powdered-fuel-feeding device the combination of a fan and chamber in which it rotates with a conveyer which conveys the fuel in mass to the fan, and air-duets separate from the fuel-conveying passage and which deliver air to the fan at the point where the fuel is delivered to it.

7. In a powdered-fuel-feeding device the combination of a fan and chamber, said fan having a hollow center with a powdered-fuelconveying apparatus containing a pipe which passes into such fan-center and having at one side an aperture which leads the fuel from the pipe into the midst of the blades of the fan.

8. -In a powdered-fuel-feeding device the combination of a fan and chamber, said fan having a hollow center with a powdered-fuelconveying apparatus containing a pipe which passes into such fan-center and provided with an aperture which leads the fuel from the pipe into the midst of the blades of the fan, said aperture being regulable as to size.

9. In a powdered-fuel-feeding device the combination of a fan and chamber, said fan having a hollow center with a powdered-fuelconveying apparatus containing a pipe which passes into such fancenter and provided with an aperture which leads the fuel from the pipe into the midst of the blades of the fan and an air-space surrounding said pipe and leading to the fan-chamber so as to bring the air into such chamber at the point where the fuel is discharged from its conveyer-pipe into the fan-chamber.

10. A powderedfuel-feeding device comprising afan and fan-chamber, an air duct or opening for conveying air to the fan, a conveying mechanism for conveying the powdered fuel to the center of the fan, se 'iarate from the inflowing air the conveying mechanism having associated therewith an aperture for in'ojecting the powered fuel toward the fan-blades.

11. A powdered-fuelfeeding device comprising a rotary fan, a hollow non-rotating part about which the fan rotates having an aperture associated therewith through which the powdered material is injected into the fan-chamber, and a conveying mechanism for conveying powdered fuel into said hollow non rotating part.

12. A powdered-fuel-feeding device comprising a fan, a hollow bearing upon which said fan is mounted and about which it retates, a conveying mechanism for conveying the powdered fuel through said hollow bearing tothe center of the fan.

CHAS. BROSSMANN, J R. lVitn esses:

LEWIS K. DAVIS, FREDERIG LANSING. 

